What appears to be the common goal of all the tribes’ invasions

of the Roman Empire?

The common goal of all the tribes' invasions of the Roman Empire appears to be to gain access to the wealth and resources of the Roman Empire.

The common goal of the tribes' invasions was to expand their territory, gain resources, establish dominance, and sometimes to assimilate or conquer other tribes. These invasions were often motivated by a desire for land, wealth, power, or the need to escape from difficult living conditions.